import math
def my_abs(x):
	if x > 0:
		return x;
	else:
		return -x;

def nop():
	pass;

def move(x, y, step, angle = 0):
	nx = x + step * math.cos(angle);
	ny = y - step * math.sin(angle);
	return nx, ny;

def calc(*strList):
	strDemo = '';
	for s in strList:
		strDemo = strDemo + str(s);
	
	return strDemo;

def person(name,age,*args,**kw):
	print ('name:',name,"age",age,"args:",args,"other",kw)

def hanoi(n,a,b,c):
	if n==1:
		print(a,'---',c)
	else:
		hanoi(n-1,a,c,b)
		hanoi(1,a,b,c)
		hanoi(n-1,b,a,c)